JP2000224648A - Mobile ratio telephone system, base station equipment, mobile station equipment and communication method for mobile radio telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile radio telephone system capable of easily and simultaneously transmitting the same data to plural pieces of mobile station equipment in simple configuration. SOLUTION: In the mobile radio telephone system for communication in a time division multiple access system, a broadcasting channel dedicated to broadcasting is formed by using prescribed time slots (ST1 and ST4 of f3) among time slots (ST0-ST5 of f1-f3) prepared for constituting the channel. Then, broadcasting data are transmitted through that broadcasting channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile radio telephone system for broadcasting additional information other than a call to a plurality of mobile station apparatuses, and a base station apparatus, a mobile station apparatus and a communication method thereof.

[0002]

2. Description of the Related Art In recent years, wireless communication technology has rapidly advanced, and accordingly, various wireless communication systems have been realized and operated. The most typical of these wireless communication systems is a mobile radio telephone system, a so-called cellular system.

[0003] A mobile radiotelephone system generally comprises a mobile switching center (MSC), a base station (BS) and a mobile station (MS), commonly referred to as a cellular phone. The mobile switching center is connected to a plurality of base stations arranged to cover a wide geographical area via a predetermined transmission path, and performs communication between mobile stations wirelessly connected to each base station. Relay. The mobile switching center is also connected to a public telephone network, and relays communication between a telephone connected to the public telephone network and a mobile station in a mobile radio telephone system. That is, the mobile switching center has a switching function for the base station and the public telephone network, and also has a management function for the mobile station and the base station.

[0004] On the other hand, a base station and a mobile station are connected via a radio line. This allows the mobile station to talk to another mobile station or a telephone connected to the public telephone network via the base station.

[0005] There are various radio communication systems between a base station and a mobile station, and a typical one is a time division multiple access system (TDMA: Time Division Multi).
plex Access). For example, in Japan, PDC (Persona)
There is a method called “l Digital Cellular” method.

In the PDC system, a plurality of frequency channels are prepared. Each of the frequency channels is divided at predetermined intervals in the time direction to form time slots, and a predetermined time slot among the time slots is used. To form a control channel and a communication channel.
In the PDC system, after transmitting and receiving control data via the control channel formed in this way, a line is connected by a communication channel to transmit, for example, voice data for a call.

[0007] In the PDC system, data of a short message as well as voice data can be transmitted via a communication channel. Incidentally, a short message is a message in which a relatively short message in characters is transmitted via a communication channel, and the receiving side displays the message on a display to enable a telephone call between users.

[0008]

By the way, in a mobile radio telephone system, if a message can be transmitted to a plurality of mobile stations, a broadcasting service of various information can be realized and the usability of the system can be further improved. It is.

As a method of transmitting a message to a plurality of mobile stations, in the case of the PDC system, the following two methods can be considered. The first method is a method using a short message as described above. In the first method, data to be transmitted to a plurality of mobile stations (hereinafter, referred to as broadcast data) is treated as a short message, and the broadcast data is sequentially transmitted to each mobile station in the same procedure as the short message. To be transmitted.

The second method is a method using a paging channel among the control channels. The paging channel is a common channel used to transmit incoming call information and the like from the base station to the mobile station. In the second method, an empty slot that is not used for transmitting incoming call information or the like among such paging channels is used,
Transmit broadcast data.

In the first method, the broadcast data is transmitted as a short message to each mobile station in order, so that it takes a very long time to distribute the broadcast data to all the mobile stations desired to receive. Is required, and a large number of communication channels are used for transmitting the broadcast data.

In the second method, since broadcast data is transmitted using an empty area of a paging channel, broadcast data that can be transmitted at one time is limited to 28 bytes, and the information amount of the broadcast data is limited. If there is more than that, the broadcast data must be divided and transmitted after waiting for the next empty slot, and it takes a lot of time to deliver the broadcast data to the mobile station. There is.
Thus, the above-described first and second methods are still insufficient as a method of broadcasting data to a plurality of mobile stations, and a further improved method is desired.

The present invention has been made in view of the above points, and proposes a mobile radio telephone apparatus and a communication method capable of easily transmitting broadcast data to a plurality of mobile station apparatuses simultaneously with a simple configuration. It is assumed that.

[0014]

According to the present invention, in order to solve this problem, another channel is formed using a predetermined time slot among a plurality of time slots obtained by dividing a channel in the time direction. In a mobile radio telephone system in which a radio channel is established between a base station apparatus and a mobile station apparatus using another channel for communication, the base station apparatus sets a predetermined time slot among time slots constituting another channel. Used to form a broadcast channel and transmit broadcast data over the broadcast channel.

[0015] In the mobile radiotelephone system adapted to communicate by the time-division multiple access method,
A broadcast channel dedicated to broadcasting is formed using a predetermined time slot among the time slots prepared for the control channel and the communication channel, and broadcast data is transmitted through the broadcast channel. Broadcast data can be simultaneously transmitted to the mobile station devices.

Further, in the present invention, the broadcast data transmitted on the broadcast channel is generated in the same signal format as the control data transmitted on the control channel.

Further, in the present invention, a control channel and a communication channel are configured as separate channels, and a broadcast channel pointer indicating the structure of the broadcast channel is transmitted by the control channel. By receiving, the physical structure of the broadcast channel is specified.

Further, according to the present invention, a paging channel can be received via a broadcast channel.

Further, in the present invention, a plurality of information channels are formed in a broadcast channel, and broadcast data is classified and transmitted according to the information type by the plurality of information channels.

Further, according to the present invention, when a forced reception command is received via a control channel or a broadcast channel, the mobile station apparatus receives broadcast data even if it is not set to the broadcast channel reception mode. To be displayed.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a PD to which the present invention is applied.
1 shows a mobile radio telephone system 1 of the C system. The mobile radio telephone system 1 has a mobile switching center (MSC) 2 and a plurality of base stations 3A to 3C. Mobile switching center 2
Is connected to each of the base stations 3A to 3C via a predetermined transmission path, respectively, and relays a communication between mobile stations of desired mobile stations 4A to 4C wirelessly connected to the base stations 3A to 3C.

The mobile switching center 2 is also connected to a public telephone network (PSTN) 5, and relays a call between a telephone connected to the public telephone network 5 and a desired mobile station 4A to 4C. I do. Further, the mobile switching center 2 has an information storage unit therein, and based on the location registration information of the mobile stations 4A to 4C stored in the information storage unit, an incoming call operation or movement to the mobile stations 4A to 4C is performed. The calling operation from the stations 4A to 4C is controlled.

As described above, the mobile switching center 2 is connected to the base station 3
A to 3C and a public telephone network 5 have a switching function, and mobile stations 4A to 4C and base stations 3A to 3C.
It has a management function.

Here, for convenience of explanation, the base station 3A
3C and three mobile stations 4A to 4C are described, but the number is not limited in the present invention. Further, the mobile stations 4A to 4C may be mobile phones having a telephone function as a basic configuration, or may be base stations 4A to 4C.
For example, a portable general-purpose computer having a wireless interface for A to 4C may be used.

The mobile radio telephone system 1 of the present invention has a broadcast management center (BMC) in addition to the above configuration.
6 and a data storage device 7. The broadcast management center 6 is connected to external information sources 8A to 8C via a predetermined transmission path, and transmits broadcast information S1 to be broadcast to the mobile stations 4A to 4C from the information sources 8A to 8C. Receive.

The broadcast information received from the information sources 8A to 8C is additional information other than telephone calls, such as politics, domestic and foreign political, economic, social and sports news and weather forecasts, or earthquakes and tsunamis. Disaster prevention information such as an alarm can be considered.

The broadcast management center 6 receives the broadcast information S
is transferred to the data storage device 7, and the broadcast information S1 is temporarily stored in the data storage device 7. When it is time to broadcast the broadcast information Sl to the mobile stations 4A to 4C, the broadcast management center 6 stores the broadcast information Sl in the data storage device 7.
Read from At that time, the broadcast management center 6 reads out the broadcast information Sl without any processing and stores the broadcast information Sl, or reads the broadcast information Sl after performing an appropriate editing process on the broadcast information Sl. As the editing process, it is conceivable to classify the broadcast information S1 according to the content or to extract only the content that meets the needs of the user.

The broadcast management center 6 adds control information to the read broadcast information S1, and sends out the resulting broadcast data S2 to the mobile switching center 2 via a predetermined transmission path.

Incidentally, the control information includes a base station number and the like, and the base station specified by the base station number actually transmits the broadcast data S2 via a wireless line. Thus, in the mobile radio telephone system 1, if all base stations are designated by base station numbers, broadcast data S2 can be broadcast to all areas.
If only a specific base station is designated by a base station number, the broadcast data S2 can be broadcast only to a specific area. In addition, since it is possible to specify the area where the broadcast data is transmitted, it is possible to broadcast, for example, weather forecast information and the like for each area.

The mobile switching center 2 extracts control information from the received broadcast data S2, and base station 3A, 3B or 3 designated by a base station number included in the control information.
Broadcast data S3 from which control information has been removed is transmitted to C via a predetermined transmission path. The mobile switching center 2
Transmits the control data S4 and the voice data S5 for the call to the desired base station 3A, 3B or 3C via the same transmission path.

The base station 3A receiving the broadcast data S3,
3B or 3C transmits the broadcast data S3 only once or repeatedly for a predetermined period via the broadcast channel. When the mobile stations 4A to 4C are set to the broadcast data reception mode by the operators of the mobile stations 4A to 4C, the mobile stations 4A to 4C receive the broadcast data S3 and display the broadcast data S3 on a display provided in the main body. . Thus, the operator can grasp information such as news provided as broadcast data in the mobile radio telephone system 1.

Here, the configuration of the base stations 3A to 3C will be described. However, since the configurations of the base stations 3A to 3C are the same, only the base station 3A will be described here. As shown in FIG. 2, the base station 3A includes a channel coding unit 10A.
And the broadcast data S3 sent from the mobile switching center 2 by the channel coding unit 10.
And the control data S4 and the voice data S5 for the call.

The channel coding unit 10 is a unit that manages each channel of the time division multiple access system used for wireless communication with the mobile station, and upon receiving the broadcast data S3, performs a predetermined coding process on the broadcast data S3. To generate the burst data for the broadcast channel and send it to the transmission unit 11. Similarly, the channel coding unit 10 controls the call control data S4 and the voice data S4.
5, the control data S4 and the audio data S5
To generate burst data for the control channel and for the communication channel, respectively, and transmit these data to the transmission unit 11.

[0034] The transmission unit 11 includes a channel coding unit 1
After performing predetermined phase modulation on the burst data of each channel received from 0, a frequency conversion process is performed to generate a high-frequency signal, that is, an RF signal, which is transmitted via the transmission antenna 12.

On the other hand, when a signal from the mobile station is received by the receiving antenna 13, the received signal is input to the receiving unit 14. The receiving unit 14 performs a frequency conversion process and a demodulation process on the received signal sent from the mobile station 4 </ b> A to extract burst data of each channel, and sends the burst data to the channel coding unit 10. The channel coding unit 10 extracts control data and voice data from the control channel and the communication channel, respectively, and sends them to the mobile switching center 2. As a result, during a call, voice data from the mobile station is transmitted to the terminal of the other party.

Next, the configuration of the mobile stations 4A to 4C will be described. However, since the configurations of the mobile stations 4A to 4C are the same, only the mobile station 4A will be described here. As shown in FIG. 3, the mobile station 4A is connected to the microphone 2 for talking.
0 and a speaker 21. During a call, a voice signal input from the microphone 20 is input to the voice codec 22, where it is coded by a predetermined coding method, and then input to the channel coding unit 23. The audio data sent from the other party is sent from the channel coding unit 23 to the audio codec 22, where it is restored to an audio signal and output from the speaker 21. This allows the operator to make a voice call.

[0037] The channel coding unit 23
Similar to the channel coding unit 10 of A, this unit manages each channel of the time division multiple access system. When receiving a call command from the operator via the key input unit 24 and the control unit 25, the channel coding unit 28 generates predetermined control data, performs predetermined coding processing on the control data, and performs control coding for the control channel. To generate burst data.

The channel coding unit 28 executes a predetermined control procedure by transmitting the burst data for the control channel to the base station via the transmission unit 26, and then establishes a radio channel of a communication channel. When the channel coding unit 23 establishes the wireless channel of the communication channel, the channel coding unit 23 performs a predetermined coding process on the voice data transmitted from the voice codec 22 and transmits the voice data via the communication channel, and transmits the voice data from the base station via the communication channel. The transmitted audio data is extracted and sent to the audio codec 22.

When receiving a broadcast data receiving command via the key input unit 24 and the control unit 25, the channel coding unit 23 transits to the broadcast data receiving mode and is transmitted from the base station via the broadcast channel. The broadcast data is extracted and sent to the display 27 via the control unit 25. Thereby, the broadcast data transmitted via the broadcast channel can be displayed, and the contents can be notified to the operator.

The transmitting section 26 is provided with the channel coding section 2
After performing a predetermined phase modulation on the burst data of each channel transmitted from 3, a frequency conversion process is performed, and this is transmitted to the base station via the antenna duplexer 28 and the antenna 29.

On the other hand, when a signal from the base station is received by the antenna 29, the received signal is transmitted to the antenna duplexer 2
8 to the receiving unit 80. The receiving unit 30 performs a frequency conversion process and a demodulation process on the received signal, extracts burst data of each channel, and sends the burst data to the channel coding unit 23.

Here, such a mobile radio telephone system 1
Will be described. In this mobile radio telephone system 1, a plurality of frequency channels, so-called carriers, are prepared, and as shown in FIG.
0 × 18 [ms] is defined as a superframe, each carrier is divided in the time direction at the time interval of the superframe, and 40 [ms] is defined as a frame, and the superframe is defined as a time interval of each frame. , And each frame is further divided at time intervals of 6.6 [ms] to form time slots ST0 to ST5.

In this mobile radio telephone system 1, each carrier is divided at a predetermined time interval to form a time slot, and each channel is formed by using a predetermined time slot among the plurality of time slots. It is made to form.

Here, as shown in FIG. 5, the channels formed by such time slots are roughly classified into three types: a control channel CCH, a communication channel TCH, and a broadcast channel BCH.

The control channel CCH is a channel for transmitting various control data, and includes a broadcast channel BCCH,
Common control channel CCCH, user packet channel U
It is classified into four types, PCH and associated control channel ACCH. The broadcast channel BCCH is a one-way channel for broadcasting control data from the base station to the mobile station, and information for location registration, information on a channel structure, information on a system, and the like are transmitted via this channel.

The common control channel CCCH is a bidirectional channel for transmitting signaling information, and is classified into a paging channel PCH and a dedicated cell channel SCCH. The paging channel PCH is a one-way channel for simultaneously transmitting control data, and paging data such as incoming call information is transmitted via this channel. The dedicated cell channel SCCH is a channel for transmitting control data, and is used when the serving cell of the mobile station is known on the network side.

The user packet channel UPCH is a bidirectional channel for transmitting control data and user packet data.

The associated control channel ACCH is a control channel associated with the communication channel TCH.
Used to transmit control data when the CH is established. The associated control channel ACCH is composed of a high-speed associated control channel FACCH and a low-speed associated control channel S.
ACCH is classified into two types.

The communication channel TCH is a channel for transmitting user data such as voice data and facsimile data during a call. The broadcast channel BCH is a channel newly provided according to the present invention, and is a channel for simultaneously transmitting broadcast data such as news to a plurality of mobile stations.

Here, each of such channels CCH, TC
H and BCH are allocated to the above-mentioned time slots as follows. For example, as shown in FIG.
Time slot ST0, S for certain carrier f1
The communication channel (T) is allocated to T1, ST3 and ST4, and the control channel (C) is allocated to the remaining time slots ST2 and ST5. Further, as shown in FIG. 6B, all time slots ST
A communication channel (T) is allocated to 0 to ST5. Also, as shown in FIG. 6C, for the carrier f3, the communication channel (T) is allocated to the time slots ST0 and ST3, the broadcast channel (B) is allocated to the time slots ST1 and ST4, and the remaining time slots ST2 and ST4 are allocated. ST
5 is assigned a control channel (C). In this manner, each of the channels CCH, TCH and BCH is allocated to a predetermined time slot among the time slots formed by dividing each carrier in the time direction.

Incidentally, the assignment example shown here is merely an example, and the present invention is not limited to this example. It is desirable that the broadcast channel BCH and the control channel CCH are allocated to the same carrier. This is because it is conceivable to switch the channel while receiving the broadcast channel BCH to receive the control channel CCH. In this case, if the control channel CCH is allocated to the same carrier, there is no need to switch the reception frequency, and the reception operation is not performed. This is because it can be simplified.

As shown in FIG. 6, a channel assigned with a half (subframe) of a frame as a cycle is generally called a full rate, whereas a channel assigned with a frame as a cycle is a transmission rate. It is called half rate because it becomes half.

By the way, in the case where the channels are allocated as shown in FIG. 6A, if the time slots ST2 and ST5 are received from each frame at the time of reception, only the control channel is allocated as shown in FIG. Can be received. The structure of the control channel is predetermined, and is configured, for example, as shown in FIG. In this example, the structure of the control channel is used for the broadcast channel (BC) from the beginning of the superframe to the fourth time slot, and two subsequent time slots are used for the dedicated cell channel (SC), Subsequent time slots are paging channel (PC) and individual cell channel (SC)
Used alternately.

In the case where the channels are allocated as shown in FIG. 6C, if the time slots ST1 and ST4 are received from each frame at the time of reception, only the broadcast channels are allocated as shown in FIG. Can be received. The structure of the broadcast channel is also predetermined, and is configured as shown in FIG. 8, for example. In this example, all time slots of a broadcast channel are used for an information channel (BI) for transmitting broadcast data. In this case, since the transmission rate of the broadcast data is a full rate transmission rate, 6800 [bit / sec]
Becomes

Similarly, when the channels are allocated as shown in FIG. 6C, if the time slots ST0 and ST3 are received from each frame at the time of reception, the time slots shown in FIG.
As shown in (1), only the communication channel can be received. The structure of the communication channel is also predetermined, and is configured, for example, as shown in FIG. In this example, the two time slots at the beginning of the superframe are used for the communication channel including the housekeeping channel (R), and all subsequent time slots are used for the communication channel including the low-speed associated control channel (S). Used for

Here, the data structure in each time slot of the control channel, the broadcast channel and the communication channel will be described. The data structures of the control channel and the broadcast channel are basically the same, and are configured as shown in FIG. As shown in FIG. 10, the time slots of the control channel and the broadcast channel are each composed of 280 bits, of which the first 4 bits are used for guard time (R) for burst transient response, and the next 2 bits are used for the preamble (R). P)
Used for The subsequent 112 bits are used for actual control data or broadcast data, the subsequent 20 bits are used for a synchronization word (SW), and the remaining 8 bits are used for a color code (CC). 11
Two bits are used again as control data or broadcast data, and the last 22 bits are used as collision control bits.
By making the structure of the control channel and that of the broadcast channel the same, there is no need to introduce a coding protocol dedicated to broadcast data, so that the device configuration can be simplified, and this is particularly effective in mobile stations.

On the other hand, the time slot of the communication channel is
It is configured as shown in FIG. That is, the time slot of the communication channel also includes 280 bits, of which the first 6 bits are used for the guard time (R) for burst transient response and the preamble (P). The subsequent 112 bits are used for information data (T) such as audio data, the subsequent 28 bits are used for a synchronization word (SW) and a color code (CC), and the further 1 bit is used for a steal flag. . The remaining 21 bits are used for low-speed associated control channel (SACCH) data or housekeeping channel (RCH) data, and the remaining 112 bits are used again for information data. When a time slot is used as a high-speed associated control channel (FACCH), information data is used as the associated control channel.

Thus, the mobile radio telephone system 1 generates burst data of the control channel, the broadcast channel and the communication channel with such a structure, and transmits the burst data at the timing of the time slot of each channel. .

As shown in FIG. 7, the control channel includes a broadcast channel. This broadcast channel is used for transmitting various control data necessary for operation from the base station to the mobile station. Here, this broadcast channel will be specifically described. Data as shown in FIG. 12 is transmitted as the broadcast channel. The message type is data indicating that the subsequent data group relates to the broadcast channel. The network number is a number for identifying a mobile radio telephone system, and is used for identification with another system. The control channel structure information literally indicates the structure of the control channel used in the system, and the control channel structure information allows the mobile station to determine the physical structure of the control channel such as the frequency and slot of the control channel. Can be grasped. Note that the mobile station can receive this broadcast channel at power-on,
The mobile station knows the frequency and slot number of at least one of the control channels.

The number of perch channels indicates the number of perch channels for determining the zone in which the camcorder is located, and the perch channel number is data indicating the frequency channel number of the perch channel.

The operator-specific information is an area that can be used arbitrarily by the operator, and the mobile radio telephone system 1 uses this portion to provide information on the structure of the broadcast channel (hereinafter, referred to as a broadcast channel pointer).
Has been made to send. This allows the mobile station to receive this broadcast channel pointer first,
The physical structure of the broadcast channel can be grasped, and the broadcast channel can be received.

FIG. 1 shows a broadcast channel pointer.
3 will be described. As shown in FIG. 13, the broadcast channel pointer includes broadcast channel pointer identification information, information length, frequency code, slot number, and broadcast channel structure information.

The broadcast channel pointer identification information is identification information indicating that the subsequent data group is a broadcast channel pointer. The information length indicates the length of the broadcast channel pointer, so that it is possible to grasp how far the information of the broadcast channel pointer is.

The frequency code is information indicating the frequency channel used for the broadcast channel, that is, the frequency of the carrier. The slot number is information indicating which slot on the frequency channel specified by the frequency code is used for the broadcast channel. With this information, the mobile station can specify the frequency and slot of the broadcast channel, and can receive the broadcast channel.

The broadcast channel structure information is information indicating the structure in the broadcast channel. For example, when the broadcast channel is configured as shown in FIG. 8, it is determined that all the broadcast channels are used for broadcast data. Is stored.

As a structure in the broadcast channel, for example, a structure shown in FIG. 14 can be considered in addition to the structure shown in FIG. In this example, information channels B11 and B12 classified into two types according to the type of information, and a broadcast control channel BS related to information channels BIl and B12 are mapped to the broadcast channel. In the case of such a broadcast channel, where in the broadcast channel the broadcast control channel BS and the information channels B11 and B1 are located.
Information such as whether 2 is mapped is stored in the broadcast channel structure information described above.

In the broadcast channel structure shown in FIG. 14, for example, news of politics and economy is stored in the information channel B11, and sports news is stored in the information channel B12, for example. The type of information contained in the information channels B11 and BI2 and / or the history thereof are stored in the broadcast control channel BS. When the broadcast channel is configured in this manner, if the operator specifies the type of broadcast data at the mobile station, only the corresponding broadcast data needs to be received, and the receiving operation can be reduced.
When the broadcast data is not updated to the latest one, there is no need to receive the broadcast data, so that the receiving operation can be further reduced.

Further, as a structure in a broadcast channel, for example, a structure as shown in FIG. 15 can be considered. In this example,
An information channel BI, a paging channel PC, and a broadcast control channel BS related to these channels BI and PC are mapped to the broadcast channel. In the case of such a broadcast channel, information indicating where the broadcast control channel BS, the information channel BI, and the paging channel PC are mapped in the broadcast channel is stored in the broadcast channel structure information described above.

By the way, as shown in FIG. 15, by mapping paging channel PC in the broadcast channel and transmitting the paging data, the mobile station can receive the paging channel even while receiving the broadcast channel. Therefore, it is possible to immediately respond to an incoming call or the like. When mapping the paging channel PC in the broadcast channel, control channel C
It is desirable to map the paging channel PC to the same position as the paging channel (see FIG. 7) formed on the CH. This is because if the paging channel PC is mapped to the same position as the control channel CCH, the paging channel can be received without reading the broadcast channel structure information.

Incidentally, also in the case of the example shown in FIG. 15, the information type and the history information of the information channel BI are stored in the broadcast control channel BS. In this example, since 15 paging channels PC are accommodated in one superframe, the transmission speed of broadcast data is 3966 bits / sec.

In the above configuration, in the mobile radio telephone system 1, the broadcast information S 1 to be broadcast to the mobile station is collected by the broadcast management center 6 and transmitted to the mobile-to-exchange center 2. The mobile management center 2 transmits the broadcast data S to the base station designated by the broadcast management center 6.
3 is transmitted.

The base station that has received the broadcast data S 3 generates burst data to be transmitted on the broadcast channel in the channel coding section 10. Specifically, the channel coding unit 10 converts the received broadcast data
By coding with the signal format shown in FIG. 0, burst data of the broadcast data S3 formed in the same signal format as the control channel is generated. Then, the channel coding unit 10 transmits this burst data using a time slot (B) allocated for a broadcast channel, for example, as shown in FIG.

On the other hand, the mobile station first receives a broadcast channel of a control channel and obtains information of a broadcast channel pointer. Thereby, the mobile station grasps the frequency and slot number of the broadcast channel. In such a state, when the reception of broadcast data is instructed by the operator, the mobile station transits to the broadcast data reception mode. Then, the mobile station receives burst data of broadcast data by receiving a predetermined slot of the frequency channel grasped by the broadcast channel pointer, decodes the burst data and decodes the burst data.
7 is displayed. Thereby, the operator of the mobile station can grasp information such as news provided as broadcast data.

According to the above configuration, a broadcast channel is formed by using a predetermined time slot among the time slots obtained by dividing the frequency channel in the time direction, and the broadcast data generated in the same signal format as the control channel is transmitted to the broadcast channel. By transmitting via a channel, broadcast data having a large amount of information can be easily transmitted to a plurality of mobile stations simultaneously with a simple configuration.

[0075]

[Other Embodiments] In the above description, a case has been described in which broadcast data is received by transition to the broadcast data reception mode by an operation of the operator. However, the present invention is not limited to this.
A forced reception command is transmitted through the control channel or the broadcast channel by inserting the forced reception information into the broadcast channel pointer or the broadcast control channel BS, and the mobile station forcibly receives the broadcast data when receiving the forced reception command. May be received. With such a configuration, for example, when disaster prevention information such as earthquake information is being broadcast as broadcast data, the broadcast data can be forcibly received and the operator can be grasped. Even when no setting is made, emergency broadcast data can be received.

In the above description, the case where the broadcast data is simply displayed on the display 27 when the broadcast data is received is described. However, the present invention is not limited to this. For example, a warning sound may be generated when the broadcast data is received, Alternatively, the display 27 may be turned on or off to urge the operator to receive the broadcast data.

In the above description, the broadcast channels are allocated at the full rate (FIGS. 8, 14 and 15).
The present invention is not limited to this, and a broadcast channel may be assigned at a half rate.

In the above description, the case has been described where the frequency and slot number of the broadcast channel are notified using the broadcast channel pointer formed in the operator-specific area in the broadcast channel. However, the present invention is not limited to this. For example, if the broadcast channel is in a fixed format, that is, if the frequency of the broadcast channel, the slot number and the data structure in the broadcast channel are fixed, the broadcast channel presence information and the broadcast Only the transmission rate information indicating whether the channel is configured at the half rate or the full rate, and the information on the emergency forced reception command may be transmitted. In this way, the area used as the broadcast channel pointer can be reduced to about 1 byte. By the way,
In this case, it is assumed that the mobile station naturally knows the frequency and slot of the broadcast channel.

Further, in the above description, 2 is included in the broadcast channel.
Two information channels BI1 and BI2 are formed, political and economic news is transmitted on the first information channel BI1, and sports news is transmitted on the second information channel BI2. However, the present invention is not limited to this. Instead, the same information may be transmitted on the first and second information channels BI1 and BI2. By repeatedly transmitting the same information in this way, the reception probability of broadcast data can be increased when the received signal strength is low at the mobile station.

In the above description, the case where the broadcast channel structure information area is provided in the broadcast channel pointer to notify the structure in the broadcast channel has been described. However, the present invention is not limited to this. A broadcast control channel BS may be provided, and channel structure information of the broadcast channel may be transmitted via the broadcast control channel BS.

In the above description, a case has been described where a plurality of information channels BI1 and BI2 are formed by dividing a broadcast channel within one superframe (see FIG. 14). However, the present invention is not limited to this. A plurality of information channels may be formed by dividing a channel in units of a superframe.

For example, when 10 information channels are formed by this method, the first information channel is formed by the first super frame in the broadcast channel, and the first information channel is formed by the second super frame. The second information channel is formed, and the tenth information channel is similarly formed in the tenth superframe in the same manner. In the eleventh and subsequent superframes, the first to tenth superframes are similarly set.
Are sequentially formed. In this way, 10 information channels can be formed in 10 superframes, and 10 information channels can be repeatedly transmitted every 7.2 seconds.

In this method as well, one superframe may be divided into, for example, two, and the same information may be transmitted twice in one superframe. In this way, the reception probability of broadcast data can be increased when the received signal strength is low at the mobile station. Such repeated transmission of broadcast data within one superframe is particularly effective when the number of information channels is large.

Also in this method, a broadcast control channel BS is provided in each superframe, and the type and history of information transmitted in the superframe, or a channel structure in which the information channel is formed in superframe units. The information may be transmitted on the broadcast control channel BS. In this way, the mobile station can grasp what information is transmitted in each superframe.

In the above description, the present invention is applied to the PDC mobile radio telephone system. However, the present invention is not limited to this, and the D-AMPS mobile radio system mainly implemented in North America is used. The present invention may be applied to a wireless telephone system or a GSM mobile wireless telephone system mainly implemented in Europe and the like. In short, if the present invention is applied to a mobile radio telephone system in which communication is performed using a time slot formed by dividing a frequency channel in the time direction, the same effect as in the above case can be obtained.

In the above description, the broadcast channel is assigned to only one of the plurality of frequency channels. However, the broadcast channel may be assigned to a plurality of frequency channels.

[0087]

As described above, according to the present invention, a broadcast channel is formed by using a predetermined time slot in a mobile radio telephone system for performing communication by time division multiple access, and broadcast data is transmitted via the broadcast channel. Has the effect that the same data can be easily transmitted to a plurality of mobile station devices simultaneously with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a mobile radio telephone system to which the present invention is applied.

FIG. 2 is a block diagram illustrating a configuration of a base station.

FIG. 3 is a block diagram illustrating a configuration of a mobile station.

FIG. 4 is a channel structure diagram showing a structure of a time slot used in a mobile radio telephone system.

FIG. 5 is a system diagram showing types of channels used in the mobile radio telephone system.

FIG. 6 is a channel assignment diagram showing an example of assignment of each channel to a time slot.

FIG. 7 is a channel configuration diagram for explaining the structure of a control channel;

FIG. 8 is a channel configuration diagram for explaining the structure of a broadcast channel.

FIG. 9 is a channel configuration diagram for explaining the structure of a communication channel.

FIG. 10 is a data structure diagram showing a signal format of burst data transmitted on a control channel and a broadcast channel.

FIG. 11 is a data structure diagram showing a signal format of burst data transmitted on a communication channel.

FIG. 12 is a data structure diagram showing a data structure transmitted on a broadcast channel.

FIG. 13 is a data structure diagram showing a data structure of a broadcast channel pointer.

FIG. 14 is a channel structure diagram showing a structure of a broadcast channel according to a modification.

FIG. 15 is a channel structure diagram showing a structure of a broadcast channel according to a modification.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mobile radio telephone system 2 Mobile switching center 3A-3C Base station 4A-4C Mobile station 5 Public telephone network 6 Broadcast management center 7 Data storage device 8A-8C Information supply source 10, 23 Channel coding unit 11, 26 Transmission unit Reference Signs List 12 transmitting antenna 13 receiving antenna 14, 30 receiving unit 20 microphone 21 speaker 22 audio codec 24 key input unit 25 control unit 27 display 28 antenna duplexer 29 antenna

Claims (51)

[Claims] 1. A different channel is formed by using a predetermined time slot among a plurality of time slots obtained by dividing a channel in a time direction, and a base station apparatus and a mobile station apparatus are formed by the another channel. In a mobile radio telephone system for establishing and communicating a radio line between the base station device, the base station device forms a broadcast channel using a predetermined time slot among time slots constituting the another channel, and A mobile radio telephone system for transmitting broadcast data via a mobile telephone. 2. The mobile radio telephone system according to claim 1, wherein said another channel includes a control channel and a communication channel. 3. The mobile radio telephone system according to claim 1, wherein the broadcast data is additional information other than a call. 4. The mobile radio telephone system according to claim 2, wherein the broadcast data includes news information, weather forecast information, or disaster prevention information. 5. The mobile station according to claim 2, wherein the base station device generates the broadcast data transmitted on the broadcast channel in the same signal format as control data transmitted on the control channel. Wireless telephone system. 6. The mobile radio telephone system according to claim 2, wherein the base station device transmits a broadcast channel pointer indicating a structure of the broadcast channel using the control channel. 7. The mobile radio telephone system according to claim 6, wherein the broadcast channel pointer includes at least information on a frequency channel and a time slot to which the broadcast channel is assigned. 8. When the broadcast channel is assigned to a fixed frequency channel and a time slot,
7. The mobile radio telephone system according to claim 6, wherein the broadcast channel pointer includes at least information indicating that the broadcast channel exists. 9. The mobile radio telephone system according to claim 6, wherein when the broadcast data is disaster prevention information, the broadcast channel pointer includes a broadcast data forced reception command. 10. The mobile radio telephone system according to claim 1, wherein the base station device transmits the broadcast data using the entire broadcast channel. 11. The apparatus according to claim 1, wherein the base station apparatus forms a paging channel in the broadcast channel, and transmits the paging data together with the broadcast data using the broadcast channel. Mobile radio telephone system. 12. The base station device according to claim 1, wherein the paging channel is arranged at the same position as a paging channel formed in the control channel.
2. The mobile radio telephone system according to 1. 13. The base station apparatus according to claim 1, wherein a plurality of information channels are formed in the broadcast channel, and the plurality of information channels classify and transmit broadcast data according to an information type. 2. The mobile radio telephone system according to 1. 14. The information processing apparatus according to claim 13, wherein the base station device forms the plurality of information channels by dividing the broadcast channel in superframe units.
The mobile radiotelephone system as described. 15. The base station apparatus forms a broadcast control channel related to the information channel in the broadcast channel, and determines the type and / or history of the broadcast data transmitted on each information channel by the broadcast control channel. The mobile radio telephone system according to claim 13, wherein the transmission is performed. 16. The mobile radio telephone system according to claim 2, wherein the mobile station device receives and displays the broadcast data of the broadcast channel when the mobile station device is set to a broadcast channel reception mode. . 17. The mobile radio telephone system according to claim 6, wherein the mobile station device specifies the broadcast channel by receiving the broadcast channel pointer of the control channel. 18. The mobile station device, upon receiving a forcible reception command via the control channel or the broadcast channel, receives the broadcast data even if the broadcast channel reception mode is not set. 17. The mobile radio telephone system according to claim 16, wherein the display is performed. 19. A different channel is formed using a predetermined time slot among a plurality of time slots obtained by dividing a channel in the time direction, and another channel is formed between the base station apparatus and the mobile station apparatus by the another channel. In the base station apparatus of the mobile radio telephone system for establishing and communicating with a wireless line, a broadcast channel is formed using a predetermined time slot among time slots constituting the another channel, and the broadcast channel is formed through the broadcast channel. A base station apparatus for transmitting broadcast data by using a base station. 20. The base station apparatus according to claim 19, wherein said another channel has a control channel and a communication channel. 21. The base station apparatus according to claim 19, wherein the broadcast data is additional information other than a call. 22. The base station apparatus according to claim 21, wherein the broadcast data includes news information, weather forecast information, or disaster prevention information. 23. The base station apparatus according to claim 20, wherein the broadcast data transmitted on the broadcast channel is generated in the same signal format as control data transmitted on the control channel. 24. The base station apparatus according to claim 20, wherein a broadcast channel pointer indicating a structure of the broadcast channel is transmitted by the control channel. 25. The base station apparatus according to claim 24, wherein the broadcast channel pointer includes at least information on a frequency channel and a time slot to which the broadcast channel is assigned. 26. If the broadcast channel is assigned to a fixed frequency channel and a time slot, the broadcast channel pointer includes at least information indicating that the broadcast channel exists. 25. The base station device according to 24. 27. The base station apparatus according to claim 24, wherein when the broadcast data is disaster prevention information, the broadcast channel pointer includes a broadcast data forced reception command. 28. The base station apparatus according to claim 19, wherein the broadcast data is transmitted using the entire broadcast channel. 29. The base station apparatus according to claim 20, wherein a paging channel is formed in the broadcast channel, and the paging data is transmitted together with the broadcast data using the broadcast channel. 30. The base station apparatus according to claim 29, wherein the paging channel is arranged at the same position as a paging channel formed in the control channel. 31. The base station according to claim 19, wherein a plurality of information channels are formed in the broadcast channel, and the plurality of information channels classify and transmit broadcast data according to an information type. apparatus. 32. The base station apparatus according to claim 31, wherein the plurality of information channels are formed by dividing the broadcast channel in superframe units. 33. A broadcast control channel related to the information channel is formed in the broadcast channel, and the type and / or history of the broadcast data transmitted on each information channel is transmitted by the broadcast control channel. 32. The base station device according to item 31. 34. A different channel is formed by using a predetermined time slot among a plurality of time slots obtained by dividing a channel in a time direction, and the mobile station apparatus and the base station apparatus are formed by the different channel. In the mobile station apparatus of the mobile radio telephone system that establishes and communicates with a wireless channel in the broadcast channel reception mode, the mobile station apparatus is formed by a predetermined time slot among the time slots configuring the another channel. A mobile station device receiving and displaying broadcast data transmitted from the base station device via a broadcast channel. 35. The mobile station apparatus according to claim 34, wherein said another channel includes a control channel and a communication channel. 36. The broadcast channel is received by receiving a broadcast channel pointer transmitted through the control channel to identify a frequency channel and a time slot of the broadcast channel. A mobile station device according to claim 1. 37. When receiving a forcible reception command via the control channel or the broadcast channel, the broadcast data is received and displayed even when the broadcast channel reception mode is not set. 36. The mobile station apparatus according to claim 35, wherein 38. A different channel is formed by using a predetermined time slot among a plurality of time slots obtained by dividing a channel in the time direction, and another channel is used between the base station apparatus and the mobile station apparatus by the another channel. In a communication method in a mobile radio telephone system for establishing and communicating with a radio line, the base station device forms a broadcast channel using a predetermined time slot among time slots constituting the another channel, and A communication method, comprising transmitting broadcast data via a channel, and wherein the mobile station device receives and displays the broadcast data on the broadcast channel when the mobile station device is set to a broadcast channel reception mode. 39. The communication method according to claim 38, wherein said another channel includes a control channel and a communication channel. 40. The communication method according to claim 38, wherein said broadcast data comprises news information, weather forecast information or disaster prevention information. 41. The communication according to claim 39, wherein the base station apparatus generates the broadcast data transmitted on the broadcast channel in the same signal format as control data transmitted on the control channel. Method. 42. The communication method according to claim 39, wherein said base station apparatus transmits a broadcast channel pointer indicating a structure of said broadcast channel by said control channel. 43. When the broadcast channel is allocated to a fixed frequency channel and time slot, the broadcast channel pointer includes at least information indicating that the broadcast channel exists. 42. The communication method according to 42. 44. The communication method according to claim 42, wherein when the broadcast data is disaster prevention information, the broadcast channel pointer includes a broadcast data forced reception command. 45. The communication method according to claim 39, wherein the mobile station device specifies the broadcast channel by receiving the broadcast channel pointer of the control channel. 46. The apparatus according to claim 39, wherein the base station apparatus forms a paging channel in the broadcast channel, and transmits the paging data together with the broadcast data using the broadcast channel. Communication method. 47. The base station apparatus according to claim 4, wherein the paging channel is arranged at the same position as a paging channel formed in the control channel.
7. The communication method according to 6. 48. The system according to claim 48, wherein the base station device forms a plurality of information channels in the broadcast channel, and classifies and transmits broadcast data according to an information type by the plurality of information channels. 39. The communication method according to 38. 49. The base station apparatus according to claim 48, wherein the plurality of information channels are formed by dividing the broadcast channel in superframe units.
The communication method described. 50. The base station apparatus, wherein a broadcast control channel related to the information channel is formed in the broadcast channel, and the type and / or history of the broadcast data transmitted on each information channel by the broadcast control channel is determined. The communication method according to claim 48, wherein the transmission is performed. 51. The mobile station apparatus, upon receiving a forcible reception command via the control channel or the broadcast channel, receives the broadcast data even when the mobile station apparatus is not set to the broadcast channel reception mode. The communication method according to claim 39, wherein the display is performed.